t4150: am --resolved fails if index has no changes

Since 6d28644 (git-am: do not allow empty commits by mistake.,
2006-02-23), git-am --resolved will check to see if the index has any
changes to prevent the user from creating an empty commit by mistake.

Add a test for this.

Reviewed-by: Stefan Beller <redacted>
Reviewed-by: Johannes Schindelin <redacted>
Signed-off-by: Paul Tan <redacted>
Signed-off-by: Junio C Hamano <redacted>

diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index c350967f026e72648c18a3db5ab217d4bfad79a5..430ae71aca1060c14802dc0db14b0d663b9aa6c3 100755 (executable)
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -425,6 +425,18 @@ test_expect_success 'am --resolved works' '
        test_cmp expected another
 '
 
+test_expect_success 'am --resolved fails if index has no changes' '
+       rm -fr .git/rebase-apply &&
+       git reset --hard &&
+       git checkout lorem2^^ &&
+       test_must_fail git am lorem-move.patch &&
+       test_path_is_dir .git/rebase-apply &&
+       test_cmp_rev lorem2^^ HEAD &&
+       test_must_fail git am --resolved &&
+       test_path_is_dir .git/rebase-apply &&
+       test_cmp_rev lorem2^^ HEAD
+'
+
 test_expect_success 'am takes patches from a Pine mailbox' '
        rm -fr .git/rebase-apply &&
        git reset --hard &&